Constitutional Issues: Separation of Powers
This lesson explores the important Constitutional mechanism providing for the separation of powers of government among three branches so that each branch checks the other two. Lesson plans use the New Deal to help teach this concept.
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Cell Division in Animals
This is a brief computer-animated video that describes differentiation in animals at the cellular level (cell division).  Once the cells are differentiated they lose the ability to divide. As a result, one cannot grow a whole animal in a culture medium from a single cell. The growth of the whole animal in a single cell is only possible in the early stages of development - after the first one or two divisions. Other key words include: ectoderm, mesoderm, and endoderm.  Run time 01:51.
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Cell and Tissue Dysfunction, Cancer and Experimental Strategies to Develop Anti-cancer Therapeutics
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The Cell Cycle, Mitosis and Meiosis
UKOER Instructional sheet
Author(s): rjm1

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Producing antibodies in plants
Dr. Lorenzo Frigerio from Warwick's Biological Sciences Department talks about the Wellcome Trust Translation Award he has received to enable him to validate his lab based work on increased yield of antibody production within plant cells using complete plants in order to show industrial scale manufacture is possible. Length: 19 minutes
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Constitutional Issues: Separation of Powers
This lesson explores the important Constitutional mechanism providing for the separation of powers of government among three branches so that each branch checks the other two. Lesson plans use the New Deal to help teach this concept.
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The Risks of Genetically Modifying Human Embryos or Gametes
Many consider genetic modification to be the riskiest mode of biomedical enhancement. The problem of unintended bad consequences is serious, but it is often misrepresented in terms of interference with the 'wisdom of nature' or the handiwork of the 'master engineer' of evolution.
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Cell structure and organization -#2
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Plants and Seasons
Join several Journey North classrooms as they become engaged in the study of tulip bulbs, and track their growth from fall to spring. In this large experiment students across the Northern Hemisphere track the growth of the same plant
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Cell Membrane: Just Passing Through
This interactive feature describes some of the most important structures and functions of the cell membrane.
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Cell Differentiation

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Cell Differentiation
In this video segment from The Secret of Life school video, "Sex and the Single Gene" follow as a single fertilized egg cell divides, differentiates, and assembles into the tissues and organs of a new organism.
Author(s): WGBH Educational Foundation

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Alporas' closed cell aluminium foam
Additions are made to molten aluminium or aluminium alloy to modify the melt viscosity and make it suitable for foaming. 1 to 3 wt% titanium hydride is then added to the melt, and this foams the melt by releasing hydrogen. The foamed melt solidifies to yield a closed cellular structure with an average cell size of 4.5 mm
Author(s): DoITPoMS, University of Cambridge,Dr V Gergely, De

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FOAMCARP closed cell aluminium foam
Additions such as SiC are made to molten aluminium or aluminium alloy to modify the melt viscosity and make it suitable for foaming. Calcium carbonate is then added to the melt which is solidified to form a precursor which can be foamed in a controlled manner by a subsequent heat treatment. The resulting foam has a fine and relatively uniform cell structure.
Author(s): DoITPoMS, University of Cambridge,D C Curran, Depa

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FORMGRIP closed cell aluminium foam
Additions such as SiC are made to molten aluminium or aluminium alloy to modify the melt viscosity and make it suitable for foaming. 1 to 3 wt% of pre-oxidised titanium hydride is then added to the melt which is solidified to form a precursor which can be foamed in a controlled manner by a subsequent heat treatment. The resulting foam has a relatively fine and uniform cell structure.
Author(s): DoITPoMS, University of Cambridge,Dr V Gergely, De

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Low magnification SEM image of open cell polyurethane foam
If a gas is injected into a liquid it forms a cellular foam structure. When a thermoset prepolymer of low viscosity is foamed, the polymer can drain from the cell walls (driven by surface tension) before it sets at the cell edges, leaving an open-celled foam. The cell edges have three concave sides, giving rise to the tri-cuspid cross section visible at the bottom of this image. The average co-ordination number for the nodes (where struts meet) is four, giving tetrahedral junctions.
Author(s): DoITPoMS, University of Cambridge,Dr J A Elliott,

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X-ray tomography image of open cell polyurethane foam
If a gas is injected into a liquid it forms a cellular foam structure. When a thermoset prepolymer of low viscosity is foamed, the polymer can drain from the cell walls (driven by surface tension) before it sets at the cell edges, leaving an open-celled foam. The cell edges have three concave sides. The average co-ordination number for the nodes (where struts meet) is four, giving tetrahedral junctions. The deformation behaviour of the foam was observed by X-ray microtomography at the ESRF i
Author(s): DoITPoMS, University of Cambridge,Dr J A Elliott,

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High magnification SEM image of open cell polyurethane foam
If a gas is injected into a liquid it forms a cellular foam structure. When a thermoset prepolymer of low viscosity is foamed, the polymer can drain from the cell walls (driven by surface tension) before it sets at the cell edges, leaving an open-celled foam. The cell edges have three concave sides, and some remnants of collapsed cell walls can be seen at the cell edges.
Author(s): DoITPoMS, University of Cambridge,J A Curran, Depa

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SEM image of open cell polyurethane foam
If a gas is injected into a liquid it forms a cellular foam structure. When a thermoset prepolymer of low viscosity is foamed, the polymer can drain from the cell walls (driven by surface tension) before it sets at the cell edges, leaving an open-celled foam. The cell edges have three concave sides, giving rise to the tri-cuspid cross section visible at the bottom of this image. The average co-ordination number for the nodes (where struts meet) is four, giving tetrahedral junctions.
Author(s): DoITPoMS, University of Cambridge,J A Curran, Depa

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Model of the monoclinic ZrO2 unit cell
Rotating model of the monoclinic ZrO2 unit cell.
Author(s): DoITPoMS, University of Cambridge

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